The Twitter account, @Illegal_Aryan, took credit for the signs, saying in an April 22 tweet that included for pictures of the flyers, "Hey UPenn- Saaaaaaay N----R! #dayoftheflyer."

The account, which has 406 followers, features a bio that reads, "I'm a good boy, I didn't do anything." It also links to The Daily Stormer, a site that regularly propagates white supremacist material.